Steam-heating apparatus.



No. 827,173. v PATENTED JULY a1; 1906;

' D. M. NESBIT. V

STEAMv HEATING APPARATUS.

APPLICATION I'ILEDOOT'. 16. 1905.

3 SHEETS-SHEET 1.

vf'A/faiP 7'": NORRIS PETERS co., wAsnincruN, n. c.

PATENTED JULY a1, 1906.

' D. 'M. NESBIT.

STEAM HEATING APPARATUS.

A APPLICATION FILED OUT. 16. 1906- 3 SHEETS-BR143732- WIT/VASSES ZYVE/VZOZ A mi NORRIS PETERS'CL'L, wasumarau. n. c.

' PATENTED J LY 31, 1906'."

' D. M. NBSBIT.

' STEAMHEATING APPARATUS.

APPLICATION FILED 00T. 16.-1906- s SHEETS-SHEET a.

' A r y IIIIIIL V a fvvvvf iP THE NORRIS Park-Rs cm, wasmuarou. n.

v UNITED STATES PATENT omen;

N 1 DAVID MEIN, NEsBIT, OF LONDON, ENGLAND.

' i I I STEIIXIVHAHEATIING APPARATUS.

J Specification ofLetters Patent.

Patented July 31; 1906.

Application filed October 161 1905. Serial No. 288,018.

lo aZZ whomit may concern:

Beit known that I, DAVIDMEIN Nnsisrr, a subject of the King of Great Britain-and Irelahdyresiding at 12 Great James street,' Bedford Row, London, W. (1., England, have inventedscertain new and useful Improvements in SteamEHe'ating Systems and Apparatus Employed Therewith, of which the following is a specification." v

This invention relates .toiheating' systems and apparatus. employed therewith, and more particularly to steam-heating systems wherein the steam from the return mainor mains is led to a combined condenser and wator-heater, such as described inthe specifica tion to'Letters Patent 'No. 614,743. In systems ofthis type the steam or vapor from the return-mains and'anywater of condensation therein is led'to one side of a "divided hotwell',:the water falling to the lower part thereof, while the steam or vapor rises to the top and passes through 'tubes surrounded. by a water-j acket. The steam-or vapor'is thereby partly condensed," and the water of condensati on falls into the hot-well but any un condensed" steam "or: vapor issuing from, the tubes into the other side of thehot-well iscondensed by awater-spray. The waterin the jacket surrounding the cooling-tubes is 'utile ized as a hot-water supply. t

The object of the present invention is to augment the supply of hot water or the heat thereof by causing the steam or vapor from thie return-mains to give up all'or nearly all its latent heat to the water in the wateracket before entering the sparge-chamber in the'hot-well, and thus at the-same time reducing the required quantity of, sparge-water and in cases'wherethe demand upon the hot- :water' supply may be so great that (or for any other reason) the exhaust or return steam may be'insufficient to provide the necessary heat for the hot-water supply.

It is the obj ectof the invention'toprovide for the automatic supply'of-live'steam to aid the exhaust or returnstea-m :in maintaining the hot-water supply. a j 1 Another'obj ect of the invention is to adapt the condensing apparatus so that it may be readily assembled or disassembled in a situationwh'ere available head-room is restricted.

The invention briefly consistspin passing the steam or vaporifrom'j the return'main or mains of a heating system b1; other waste or base-level as the hot-well or receiver.

exhaust steam through an auxiliary coil or coils within or connected with the waterjacket of the cooling-tubes of an apparatus of the type referred to before said steampasses into and through the tubes of the apparatus.

The invention also consists in providing a live-steam coil in addition to or instead of the auxiliary coil forthe exhaust or return steam and in controlling the supply of live steam thereto automatically, according to the temperature prevailing in the water-j acket or hotwater supply.

he invention further consists in the special construction and arrangement of parts forming the combined condenser and water heater hereinafter referred to.

Inthe accompanying drawings, Figure 1 is an elevation of one form of apparatus according to the invention, Fig. 2 being a longitudinal sectional elevati-on,'and Fig. 3 is a detail section illustrating a modification. Inicar'rying out the invention according to one mode, as shown in Figs. 1 and 2, a hotwell or receiver a is used, having a vertical.

pipe f and outlet 9 for condensed'watenwhich may'be utilized for feed-water or other puroses; p The top of the hot-well is in the form of a tube-plate h to which a number of tub es i are fitted. V

When the apparatus is to be installed in a cellar or other place where head room is limited, these tubesare curved over, as shown, and extend horizontally, or approximately-so. They are inclosed within a waterjacket which is preferably made up of two vertical end chambers 7c Z and a horizontal connecting-chamber m, all three communicating. The two end chambers preferably have removable cover-plates at the topor sides, and the end chamber remote from the hot-well is extended downwardly preferably to the s a inle I s extension contains an auxiliary coil 0% or coils or set of tubes through which the exhaust steam or "vapor from the return-main is chamber a of the condenser and thence around the tubes i therein. It may be drawn through the auxiliary coil n or coils by a pump n and from thence passed into the condenser, or the partial vacuum maintained in the sparge side 6 of the hot-well may be arranged to create the necessary suction. It will thus be obvious that the steam first passing through the auxiliary coil n or coils and then through the condenser-tubes i will impart practically all its latent heat to the water in the water jacket, and a much greater supply of hot water may be maintained than has been hitherto possible in apparatus of this type.

It is to be understood that any desired connections, such as 0 p 9, may be made to the water-jacket for leading cold water thereto and withdrawing warm water therefrom. It is preferred to arrange the inlet for cold water near the tubes of the condenser and the outlet for warm water near the auxiliary coil or coils; but this arrangement may be varied. It is also to be understood that the form of water-jacket may be varied to suit the position where the apparatus is to be installed and that the auxiliary coil 11 or coils may be arranged in any suitable part of or extension of the mainwater-jacket, or it or they may be in an entirely separate casing connected thereto by piping or otherwise.

The condenser-tubes i when horizontal or inclined may be supported by a perforated plate 1".

In cases where the demand upon the hot water supply is likely to be so great that the heat of the return or exhaust steam is insufficient to maintain the water at the required temperature it is preferred to utilize live steam to make up the deficit. F or example, live-steam connection u may be made to the inlet (1 and be controlled by a thermostatic valve a, so that when the temperature of the water drops below a predetermined degree live steam is admitted, but cut off when the temperature of the water rises to the required amount. In another example another coil 25 in Fig. 2 in addition to or instead of the auxiliary coil n, Fig. 1,.hereinbefore referred to, may be fitted in any suitable part of the water-jacket or in a chamber in connection therewith and live steam, preferably of low pressure, be supplied thereto, the supply being regulated according to the rise or fall of temperature in the hot-water supply and preferably automatically regulated, as by a thermostatic device a, so that when the temperature drops below a predetermined degree live steam is supplied, but when the temperature rises the live steam is reduced or entirely out off. The live-steam coil t may conveniently be arranged near or about the auxiliary coil.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be per formed, I declare that what I claim is 1. A combined water heater and condenser for use in a steam-heatin g system, comprising an inlet-chamber for the exhaust-steam, tubes connecting the same with allot-well, a waterjacket surrounding said tubes, and an auxiliary coil in contact with. the water of the jacket and through which the exhaust-steam is passed. on its way to the inlet-chamber.

2. A combined water heater and condenser, comprising an inlet-chamber for exhauststeam, at hot-well, tubes connecting the two, a water-jacket surrounding said tubes, an auxiliary coil in contact with the water of the jacket and through which the exhaust-steam passes on its way to the inlet-chamber, a livesteam connection to the inlet-chamber and. a thermostatic valve influenced by the prcva lent heat of the waterjacket for controlling the supply of live steam.

3. A combined water heater and condenser for use in a steam-heatin g system, comprising an inlet-chamber for the exhaust-steam, tubes connecting the same with a hot-well, a waterjacket surrounding said tubes, an extension from said jacket, an auxiliary coil in said extension through which the exhaust-steam is passed. on its way to the inlet-chan'lber, a livesteam coil in the jacket and a thermostatic valve for controlling the supply 01f the'live steam.

4. A combined water heater and condenser for use in a steam-heating system, comprising a vertical casing divided into an inlet-chamber for the exhaust-steam and a hot-well, a horizontal water-jacket mounted on said casing and containing cooling-tubes connecting the two chambers, a second. vertical casing forming an extension of the water-jacket, and. a coil in said extension, substantially as and. for the purpose described.

5. A combined water heater and condenser comprising a vertical casing divided. into an inlet-chamber for exhaust-steam and a hotwell, a horizontal waterjacket mounted thereon and containing cooling-tubes connecting the two chambers, a second vertical casing forming an extension of the waterjacket, a coil in said extension through which the exhaust-steam passes on its way to the inlet-chamber, a live-steam. coil in the waterjacket and connected to the inlet-chamber, and a thermostatic valve influenced by the heat of the water in the jacket for controlling the supply of live steam, substantially as and for the purpose hereinbefore set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

DAVID MEIN NESBIT.

\Vitnesses:

ALBERT E. PARKER, FRANoIs J. BIGNELL. 

